Immunohistochemical features lymphoid tissue colonic mucosa of children with different phenotypic variants of Crohn’s disease

Abstract

The aim of the study was to determine the immunohistochemical features of the lymphoid tissue of the mucous membrane (MM) of the colon in children with different course of Crohn’s disease. Methods: the results of IHC and morphometric analyzes of colonic colony of children with Crohn’s disease of uncomplicated and complicated course are presented. Results: An important role of the ratio and distribution of subpopulations of T-lymphocytes of CO and lymphoid clusters in children with Crohn’s disease is shown, depending on the phenotypic variant of the course of the disease. In children with a favorable prognosis of Crohn’s disease, the immunoregulatory index (IRI) was close to normal with a predominance of the CD4 + T-lymphocyte population against the background of a moderately increased number of CD8 + cells and B-lymphocytes. IRI of children of the II group was significantly increased due to a sharp increase in CD4 +, CD8 + T-lymphocytes and CD19 + B-lymphocyte link. Conclusion: A high level of IRI with a pronounced disproportion of intrapopulation T-lymphocytes is combined with an unfavorable course of the disease. For children with uncomplicated course of the disease, a minimal mismatch in the intrapopulation T-lymphocyte system is characteristic against the background of increased IRI.